Features Wide frequency response high S NratioResist disturbing strongly limit noise outputHigh precision quartz crystal locked frequency technologyNo hitting when putting in the switch so can protect the amplifier and SpeakersWith a complete working state and power level indicationtwo microphone at the same time to sing without any disturbing caused byFrequency range UHF500 599MhzFrequency stability 0 005 Modulation method FMFrequency response 20HZ 18KH 3dB Signal to noise ratio 100dBT H D less than 0 8 Distance 20 meters 80 metersTemperature range 10 degrees 70 degreesReceiving system quartz crystal lock frequency level high stabilitySensitive bottom 10UV 40dB EMFAudio output 0 0 35Vp p5K loadPower supply 220V 50Hz Note Please allow 1 5mm error due to manual measurement and make sure you do not mind before ordering Package Included 1 x Receiver2 x Microphones1 x 6 35mm Audio Line1 x Power Line1 x Manual